Add debouncing to the search input in Angular using RxJS and the debounceTime operator.

In Angular, you can use the (click) event binding to create a denounce functionality. Debouncing is a technique that delays the execution of a function until a specified amount of time has passed since the last time the function was called.

Here's an example of how to implement a debounce function in Angular:

1. Import the debounceTime operator from the rxjs/operators library:

2. Create a subject to emit the click events:

3. Subscribe to the subject and use the debounceTime operator to delay the execution of the function:

4. Add the (click) event binding to the HTML element and call the next() method of the subject to emit the click event:

This will create a debounced click functionality that delays the execution of the function by 500 milliseconds after the last click event. You can adjust the debounce time to suit your needs.

    import { Subject, Subscription } from 'rxjs';

    import { debounceTime, distinctUntilChanged } from 'rxjs/operators';

  searchModelChanged: Subject<string> = new Subject<string>();

  private searchSubscription: Subscription

searchQuery:string;

  subscribeSearch(){

    this.searchSubscription = this.searchModelChanged

    .pipe(

      debounceTime(5e2),

      distinctUntilChanged()

    )

    .subscribe(search => {

      this.search(search);

    });

  }

 

  search(value: string) {

    // http service for search

  }

  ngOnDestroy() {

    this.searchSubscription.unsubscribe();

  }

   HTML:

   <input placeholder="search" [ngModel]='searchQuery' (ngModelChange)='searchModelChanged.next($event)'>

searchModelChanged  A Subject is a special type of Observable that allows values to be multicasted to many Observers. and we subscribe this and event will be sent from input (html)